school of Chemical & Environmental Engineering,China University of Mining & Technology ( Beijing)National lnstitute of Clean-and-Low-Carbon Energy

为了提高神木弱黏性长焰煤(SM)的成浆性能,在气体热载移动床反应器中对其进行热解,制备了不同热解温度下的半焦,并分别对SM、半焦和二者的等质量比配合样进行水煤浆的成浆特性考察。结果表明:热解可以使SM的定黏浓度从65.2%提高到69.6%,而屈服应力τy和稠度系数K变化不大,说明热解改性是提高SM成浆性的有效方法;SM和半焦的孔结构分析、傅里叶红外光谱及酸性基团分析表明,半焦煤阶的提高、含氧官能团的减少和孔隙结构更加丰富是半焦成浆性提高的主要原因;配合样浆体的定黏浓度介于SM和半焦之间,并且其流变特性和稳定性优于SM浆体,说明半焦的成浆性能对配合样的成浆性起决定作用。试验结果表明,半焦与原煤混配是提高原煤成浆性的简易且经济的方法。

in order to improve the slurry ability of weak caking long fame coal from Shenmu area( SM) SM was pyrolyzed on self-dsigned moving bed reactor withnitiogen heat-carier ataifferent temperatures and diferent chars were obtained.The perormance of coal water sury CWS) was investigated prepared by SM.,chars and SiMl har mixtures respectively: The resuts showed that the concentration of coal water tuory increased from 65.2% to 69.6% prepared by pyrolysis of SM,.while theyielding stress and consistency coeficient had no obvious diffrence which indicated pyrolysis was a ood way to improve the Cws abilit , The analysis resuits of FTR,acidic functional groups and pore structure of SM and chars showed that pyrlysis improved the metamorphic degree of harreduced the content of oxygen-containing functional groups and changed the pore ste distribudion of chars which were the kesy factors for improving the sury abiity of chars.The perfomance of CWS prepared by SM/ char mixtures was betwee SM and chars and the heology and saility of CwS was beter than SM. which indicated that CwS abliy was determined by char. The above results showed that char with raw cal blending was an economical and feasible method for improving slury ability of SM.

国家高技术研究发展计划(863计划)资助项目(2011AA05A202；2013AA051202)；